Russell b



RUSSELL B. PERKINS, OF MERIDEN, CONNECTICUT, ASSIGNOR TO CHARLES PARKER,OF-SAME PLACE.`

Leners Patent No. 88,734, ma .41ml 6, 1869.

MECHANICAL ADJUsTMENsi-.-

The `Schedule refrred to in these Letters Patent and making part of theannie. i

Q-@tn To all whom it may concern Be it known that I, RUssnLL B. Pnnms,of Meriden, in the county of New Haven, and -State of Connecticut, haveinvented a new Mechanical Adjustment; and I do hereby declare thefollowing, when taken in connection'with the accompanying d rawings, andthe letters of reference marked thereon, to be a full, clear, and exactdescription of the same, and which said drawings constitute part of thisspecification, and rep! resent in- Figure 1,`a front view,

lFigure 2, a side view, and in Figures 3 to 9, inclusive, detachedviews, to illustrate the construction and operation.

This invention relates to an adjustment for a conmeeting-rod, the`objectbeing to lengthen or shorten the connecting-rod without changing theextent of the reciprocating movement imparted through the said rod.

To enable others to fully understand my invention, I will proceed todescribe the same as illustrated in the accompanying drawings.

For convenience of illustration, I show my improvement as applied to theslideof a power-press.

A is the head of the rod, by which it is attached to a crank, or othermeans for imparting a reciprocating movement thereto.

B is the other end of the rod, by which the connection is made to theslide C, or to whatever it is desired to impart a reciprocatingmovement. Y

The reciprocating movement being positive, and there being no desire tomake tadjustable, it is often desirable to adj ust the said movement asto the point of 'starting and stopping, without changing the extent ofthe said reciprocating movement.

l The two ends are made separate the one from the other, and in one(here represented as A) I x an ecV centric D, so as to turn freelyin-its bearing, the eccentricresting in a block, E, and the said blockin a slot,

F, of the end A., as seen in figs. 5 and 7. Therefore, as the eccentricis turned, as from the position in fig. 7 to that in iig. 8, (whichreverses the eccentric from one extreme to the other,) the rod islengthened the extent of the eccentric at any point between these twoextremes. The length of the connection may be adjusted by turning theeccentric. l v

Thus, by this simple adjustment, the length of the rod may be adjustedto vary the point of starting or stopping of the reciprocatingmovementimparted throughl the rod without in any way affecting the extent of thesaid reciprocating movement, and this adjustment may be placed at anyconvenient point between the two extremes. 4

I prefer to adjust the eccentricby xing to its axis a toothedwheel, H,and a worm, I, arranged to operate therein, so that by turning thesaidworm the eccentric may be nicely adj usted while the rod is moving.Other means for adjusting the eccentric, itwill be readily seen, may bedevised by persons skilled in the constructionv or use of suchmachinery. p

By preference, I make the head A of the rod in two parts, as seen infigs. 3 and 6, and also 'seen in tlg. 9,

so as to receive the end, A, andthe eccentricbetwee'n i l the said twoparts.

Having described my invention, v What I claim as' new and useful,and'desire to secure by Letters-Patent, isl The. two parts, A and B, ofa connecting-rod, combined with the eccentric D, so that by the turningof the said eccentric the said two parts maybe adjusted,

.to lengthen or shorten theirextremes, substantially as and for thepurpose herein set forth.

B. B. PERKINS. Witnesses:

' `Amazon PRATT,

GEO. W. SMITH.

